Big Engines
\( \frac{radius (px)}{1}\ = \sqrt{ \frac{\pi \cdot diameter \cdot height}{2}\ } \)
\( \frac{border (px)}{1}\ = \max{( \sqrt{\frac{cost (c)}{1000}}, 0.5)} \)
Small Engines
\( \frac{radius (px)}{2}\ = \sqrt{ \frac{\pi \cdot diameter \cdot height}{2}\ } \)
\( \frac{border (px)}{2}\ = \max{( \sqrt{\frac{cost (c)}{1000}}, 0.5)} \)
Tiny Engines
\( \frac{radius (px)}{10}\ = \sqrt{ \frac{\pi \cdot diameter \cdot height}{2}\ } \)
\( \frac{border (px)}{10}\ = \max{( \sqrt{\frac{cost (c)}{1000}}, 0.5)} \)